Nexus R5 LSx DBW Terminated Harness – DBW ready Injector Connector: EV6

Drive-By-Wire Mastery for Modern LS Swaps

The Nexus R5 LSx DBW Terminated Harness is the comprehensive wiring solution for building a modern, Drive-By-Wire (DBW) GM LS V8 application. As electronic throttles become the standard for performance builds—offering features like cruise control, traction management, and rev-matching—the wiring complexity increases. This harness simplifies that complexity by pre-terminating connections for the DBW throttle body and accelerator pedal, integrating them directly into the Nexus R5’s sophisticated control logic. Furthermore, this harness leverages the R5’s built-in Power Distribution Module (PDM), powering the engine and chassis accessories without external relays. Terminated with EV6 (USCAR) injector connectors, it is perfectly suited for Gen IV LS engines (LS2, LS3, LS7) and modern aftermarket injectors.

Engineering Deep-Dive: Safety and Redundancy

Drive-By-Wire systems require redundant signal paths for safety compliance. This harness is engineered with shielded, multi-core wiring for the Accelerator Pedal Position (APP) and Throttle Position (TPS) circuits to ensure zero signal interference. The Nexus R5 monitors these redundant signals continuously, and the harness ensures that this data stream is unimpeded. The power distribution aspect is equally robust; 25-Amp High Current Outputs (HCOs) are dedicated to the fuel pump and cooling fan, utilizing 12AWG wire to prevent voltage drop and ensure pumps run at full capacity. The harness also supports the Nexus R5’s onboard dual wideband controllers, allowing for closed-loop fueling accuracy without additional external controller boxes.

Operational Benefits: A Clean, Professional Install

This harness transforms an engine bay from a rats’ nest of relays and fuse blocks into a clean, motorsport-grade installation. By centralizing power and control into the Nexus R5, the physical footprint of the electrical system is drastically reduced. The harness includes breakouts for Flex Fuel sensors, boost control solenoids, and transmission control, effectively covering all the bases for a high-performance street or race car. The inclusion of alternator adapters ensures that your charging system is integrated and monitored by the VCU.

Fitment and Application Scope

Designed specifically for:

• Engine: GM LS-Based V8s with Electronic Throttle (DBW).
• Injectors: Engines using EV6 / USCAR style connectors (Common on LS2/LS3/LS7 and ID/FIC injectors).
• Pedal: Universal breakout for DBW pedal wiring (User to terminate to specific pedal).
• Ignition: Interfaces with OEM GM Coil Sub-harnesses.

Technical Specifications

Summary & Includes

The HT-186205 is the ultimate solution for DBW LS builds, offering PDM integration and OEM-level reliability.

Includes:

• 1 x Terminated Harness (DBW, EV6 Injectors)
• 1 x Alternator Adapter Set
• 1 x Connector Pack for Aux Devices
• 2 x DTP-2 High Current Connectors (12AWG)
• 1 x DT-8 Connector (18AWG)

Tech Tip: While the harness is DBW ready, the pedal side is a breakout. You will need to terminate the pedal connector specific to your GM or aftermarket pedal assembly.